SKF Nitrile Rubber (NBR) Seal, 50 mm ID, 80 mm OD, 8 mm

This seal is a radial rotary shaft seal designed to retain oil or grease between moving and stationary components. It features a rubber outside diameter and a single elastomeric sealing lip with a garter spring to maintain contact, making it suitable for shafts requiring dynamic sealing under rotary motion.

• Nitrile rubber lip offers chemical resistance and wear protection
• Garter spring maintains consistent radial load for reliable sealing
• Rubber outside diameter ensures secure press-fit in bore
• Permits circumferential speeds up to 7.8 m/s for moderate-speed shafts
• Operates across −40°C to 100°C continuous temperature range
• Withstands short-term temperature peaks to 120°C for transient events

• Suitable for sealing rotating shafts in automation actuators
• Ideal for gearboxes requiring oil containment under rotation
• Used with electric motor shafts in industrial drives
• Can be used for rotating assemblies in mechanical transmission systems

It matches a 50 mm shaft diameter and fits an 80mm housing bore, with a seal width of 8mm.

The design accommodates minor shaft-to-housing misalignment while maintaining sealing contact thanks to the elastomeric lip and spring preload.

Maximum recommended rotational speed is 3,000 r/min to remain within the specified circumferential speed.

It is designed for low differential loads and is rated for a pressure differential of around 0.03 N/mm.

A thin-walled sleeve product is commonly used to repair worn housings or shafts before fitting the seal.